二、单项选择（每小题1分，共10分）
请选择最佳答案，将其标号在答题卡上涂黑。
31. This is _______ MP4. Yours is over there.
A. my B. me C. I D. mine
32. Look! The boys _______ football on the playground.
A. plays B. play C. are playing D. played
33. — Have you ever been to Nanning? — Yes, _______ .
A. I was B. I do C. I am D. I have
